Problems $_GET if using .htaccess to remove index.php

1) Use this .htaccess to fix and remove index.php

    RewriteEngine On
    RewriteBase /

    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php/$1 [L]
 

2)edit your application/config.php

$config['uri_protocol'] = "AUTO";

to

$config['uri_protocol'] = "PATH_INFO";

3) Put to your controller

parse_str($_SERVER['QUERY_STRING'],$_GET);

3)start using $_GET or

$this->input->get('input');

p/s: original post are here